Modeling Error Please help me
It's a bit hard to visualize without having the actual mesh, but I think you just have an extra loop in there.  If you just merge the points on the yellow edge here to the points to their right, you'll be pretty close to correct.





OK, then add this edge in green, delete the edge in red, and move the top endpoint of the green edge over to the right:



That should give you this edge in your reference model:



Then I think the last problem edge is the one that curves over the top of the bicep.